Tool for applying fastener elements



Jan. 1, 1935. c. o, CARLSON 'TOOL FOR APPLYING FASTENER ELEMENTS FiledD60. 29, 1953 4 Sheets-Sheet l Jan. 1, 1935. c. o. CARLSON 1,986,711

TOOL FOR APPLYING FASTENER ELEMENTS Filed Dec. 29, 1933 4 Sheets-Sheet2 1. ymf //IIIIII/I/II/Ill -32 gfiiflu j-lyp/ ig ///4 4/ 6? 57 6? 40lawenior:

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Jan. 1, 1935. c. o. CARLSON 1,986,711

TOOL FOR APPLYING FASTENER ELEMENTS Filed Dec. 29, 1953 I 4sileetfisheet 3 [Wei afar. CLflEE/VCE O. CqeLso/v,

1935- c. o. CARLSON 1,986,711

TOOL FOR APPLYING FASTENER ELEMENTS Filed Dec. 29, 193s 4 sheets-sheet 4Pg. Z

Invenfor: CLQEENCE O. CflELO/V,

Patented Jan. 1, 1935 UNITED STATES PATENT o1=1=1c1a- Clarence Q.Carlson, East Cleveland, Ohio, assignor to The American Steel and WireCompany of New Jersey,a corporation of New Jersey Application December29, 1933, Serial No. 704,560

- 4 Claims. (01. 819.1)

This invention relates to a tool for applying fastener elements, andparticularly those which are used to unite-the overlapping ends of boxstraps and the like, although not limited thereto.

In my co-pending application, entitled Fasteners, filed. December 29,1933,'and bearing Serial No. 704,561, there is disclosed a novelfastener element for uniting the ends of tying elements, such as boxstraps and the like, in such manner as to positively prevent theirrelative movement. The fastener element of the co-pending applicationcomprises-a substantially U-shaped blank providingdownwardly extendinglegs, and hav ing a plurality of inwardly extending apertures from bothof its longitudinal edges, the axis of the bends of the legsintersecting the substantial mid-portion of the apertures.

The fastener described is intended to be used in such manner that thelegs of the U-shaped blank will tightly embrace the overlapped ends of atying element of the type referred to, and the material of the latter isupset through the apertures, causing lugs to be sheared inwardly fromits edges, and thus made tointerlock with the side edges of theapertures.

Among the objects of the present invention is.

the provision of a novel tool for applying fastener elements, andparticularly of the type described, which will be cheap and easy tomanufacture and may be worked with utmost speed and simplicity. Theseand further objects will be apparent after referring to the drawings, inwhich: Figure l is a side elevation of the device of the invention.

Figure 2 is a perspective of the preformed blank another stage ofoperation.

. Figure 6 is a sectional view on the line VIVI of Figure 5.

Figure 7 is a sectional elevation on the line having offset L -shapedflanges 4 and 5, respectively, and which, when joined together, form r ahousing for the elements of the invention.

The end of a handle 6 is disposed between the L-shaped flanges 4 and 5of the side plates 2 and 3, and united thereto as by means of bolts andnuts '7 and 8, respectively. A pin 9 is mounted in the upper end of thehousing formed by the frames 2 and 3 and secured thereto by means ofnuts 12 on the outside thereof. An operating lever 14 is pivotallymounted an the pin 9 and provided with an offset end 15. A pair of links16 are connected to the offset portion 15 of the operating lever 14 bymeans of a pivot pin 17, which is held in place by a centrally disposedlock pin 18. A second pivot pin 20 is provided with flattened ends, asshown at 21, which are adapted to ride in an elongated aperture 22 ineach of the side plates 2 and 3. A pair of links 23 are connected to thepivot pin 20 and made to extend toward one of the edges of the plates 2and 3, while a pair of similar links 24 are also connected to the pin 20at positions more adjacent its ends. A jaw lever 25 is connected at oneof its ends to the links 23 by means of a pivot pin 26, whichis'provided with a lock plate 27. A jaw lever 29 isconnected on one ofits ends to the links 24 by means of a pin 30. The jaw lever 25 isprovided with a journal 32 intermediate its ends, and a similar journal33 provided for the jaw lever 29. A pivot pin 34 is made to extendthrough the journal 32 in the jaw lever 25, and a similar pin 36provided for the journal 33 of the jaw lever 29, and are both secured tothe end plates 2 and 3 by means of nuts 38. The jaw lever 25 carries onits outer end an inwardly extending jaw 40, while a similar jaw 41 isprovided on the outer end of the jaw lever 29.

A plunger rod 43 is disposed between the jaw levers 25 and 29 and isprovided with an elongated slot 44 adjacent its upper end. A shearingplunger 45 is carried by the other end of the plungerrod 43 and providedon each of its sides with a plurality of downwardly extending lugs 46.The shearing plunger 45 is tightlysecured to the plunger rod 43 by meansof a centrally disposed screw 49. A

A guide block 51 is connected to the lower extremity of the side plates2 and 3 by means of capscrews 52, and is profiled with a plurality ofslots 53 for receiving the downwardly extending lugs 46 on the shearingplunger 45. The shearing plunger'45 is biased away from the guide block51 by' means'of a spring 55 which seats in a recess 57 inthe latter.

A substantially U-shaped clip 59 is disposed in such manner as toloosely embrace the guide block 51, and carries a plurality ofdownwardly extending tongues 60, which contact with the outer sides ofthe guide block 51 and provide apertures therebetween, as at 61, whichpermit the lugs 46 of the shearing plunger 45 to seat in the slots 53 inthe guide block.

The ends ofthe tongues 60 are made to extend inwardly, as at 62.

Referring to Figures 2 and 3 of the drawings, there is disclosed thefastener of my co-pending application, previously identified, whichcomprises a rectangular plate '70 having a plurality of apertures 71adjacent and parallel its longitudinal edges. manner as to providedownwardly extending leg portions 72 and 73. The apertures '71 arebisected at their substantial mid-portions by the axes of the bendsforming the downwardly extending legs 72 and '73.

In operation, a box strap is made to embrace an article and its ends, asshown at 75 and 76 of Figure 3, are arranged in overlapped relationship.

The blank of the fastener is placed between the inwardly extending ends62 of the tongues 60, while the device is in the position of Figure 1.The operating lever 14 is moved from its open position toward the handle6 which is secured to the flanges 4 and 5 of the end plates 2 and 3,respectively. As the lever '14 moves, its offset portion 15 lowers thelinks 16, which in turn move the pin 20 downwardly in the elongatedslots 22. This motioncauses the links 23 and 24 to extend in the mannerof Figure 5, thus bringing together the inwardly extended portions 40and 41 of the jaw levers 25 and .29, respectively. This coming togetherof the members 40 and 41 bends the downwardly extending legs '72 and 73of the blank and causes them totightly embrace the ends '75 and 76 ofthe box strap. As the pin 20 continues to descend it engages the plungerrod 43 at the bottom of its elongated slot 44 and causes it to lower theshearing plunger 45, moving the downwardly extending lugs 46 in theslots 53 in the guide block 51. v

The lugs 46 will thus be made to contact with the exposed portions ofthe upper end of the box strap and depress the same in the apertures 71.The exposed portions of the box strap will bend and partially shearinwardly and form lug portions '75 and 76 from the strap. These lugportions '15 and 76 engage the side edges of the apertures '71 andpositively prevent relative movement between the blank and the ends ofthe strap.

The operating lever 14 is then moved to its original position, whichopens the jaw levers 25 and 29, and raisesthe plunger rod 43 and theshearing plunger. 45, together with its lugs 46, prior to anotheroperation.

embodiment of my invention, it will be understood that I do not wish tobe limited exactly thereto, since various modifications may be madewithout departing from the scope of my invention, as defined in thefollowing claims.

The plate 70 is preformed in 'such' I claim:

1. A device for applying U-shaped fastener elements having a pluralityof apertures, a: substantially U-shaped clip carried by said device, theedges of said clip having downwardly and inwardly extending lugs forengaging the side walls of one of said U-shaped fastener elements, meansfor causing said element to tightly embrace the object to which it is tobe applied, and means for bending and partially shearing portions ofsaid object through the apertures in said fastener element.

2. A device for applying U-shaped fastener elements having a pluralityof apertures, comprising a housing, a pair of jaw members pivotallymounted on said housing, a pin slidably mounted on said housing, linksconnecting said J'aw members and said pin, a handle secured to saidhousing, 'a lever pivotally mounted on said housing, at least one linkfor connecting said lever with said pin, a plunger connected to saidpin, a block secured to said housing, means associated with said blockfor supporting one of said fastener elements, said jaw members beingoperable to cause said fastener element to tightly embrace the object towhich it is to be applied, and means on said plunger for bending andpartially shearing portions of said object through the apertures in saidfastener element.

-3. A device for applying fasteners comprising a housing, a pair of jawmembers pivotally mounted on said housing, an operating linkage for saidjaw members, a plunger connected to said linkage, said plunger beingprovided on both of its sides with a plurality of vertically dependinglugs, a block disposed between the lugs on said plunger and secured tosaid housing, said block being profiled to receive said lugs, asubstantially U-shaped clip carried by said block and providingvertically depending fingers for embracing the outer surfaces of thesides of said block, said vertically depending fingers having inwardlyextending ends, a spring for biasing said plunger away from said block,and mean for actuating said-operating linkage.

4. A device for applying fasteners comprising a housing, a pair of jawmembers pivotally mounted on said housing, an operating linkage for saidjaw members, a plunger connected to said linkage, said plunger beingprovided on both of its sides with a plurality of vertically dependinglugs, a block disposed between the lugs on said plunger and secured tosaid housing, said block being profiled to receive said lugs, asubstantially U-shaped clip carried by said block and providingvertically depending fingers for embracing the outer surfaces of thesides of said block, said vertically depending fingers having inwardlyextending ends, a spring for biasing While I have shown and describedone specific said plunger away from said block, a handle secured to saidhousing, and a lever pivotally mounted on said housing for actuatingsaid operating linkage.

CLARENCE O. CARLSON.

